an Entity references as follows:
Joh. Seb. Bach's Werke (lit. 'Joh. Seb. Bach's works') is the Bach Gesellschaft's collected edition of Johann Sebastian Bach's compositions, published in 61 volumes in the second half of the 19th century. The series is also known as Bach-Gesellschaft edition (German: Bach-Gesellschaft Ausgabe; BGA). It is also referred to as Bach-Gesamtausgabe (BG; lit. 'Bach complete edition'). It is a German-language edition: title pages and notes by editors are exclusively in German.